Bolt for internal-combustion engines.



V D. V. ASHLEY.

BOLT FOR INTERNAL GOMBUSTION ENGINES. APPLIOATION FILED 11,111.9, 1912,

1,059,103. Patented Apr. 15, 1913.'

. DOUGLAS V. ASHLEY, OF BINGHAMTON, NEW YORK.

BOLT FOR ITERNAL-(OMBUSTION EN GIN ES.'

Specification of Letters Patent. i

1 Patented Apr. V15, 19.13.

Application led March 9, 1912. Seri-al No. 682,722.

'a allfwhom, t may concern.' f

Be itvknown that' I, DOUGLAS V.;ASHLEY, l

" ra citizen of theUni'ted States, vresiding, at

Binghamton, in the county of Broome and State of New York, have invented newand usefulImprovement-s in Bolts for Internal# Combustion Eng ingf is a specificatlon.

.This invention relates to internal combustion engines, and its object is to provide a convenient device for communicating with the combustion space of the cylinder of such an engine. It has been-a matter of considerable study and experiment to obtain some way of admitting gas or fluid into the cylinder without drilling the water jacket. The increasing use-of sel/f starters makes such a vdevice of especial advantage, where a ycharge of gasolene or of acetylene gas from a generator or compressed air from a reservoir is the medium relied upon to give the initial impetus to the piston. Some engines are provided with pet cocks which afford entrance into the cylinder, but even in such casesit is desirable to have some other means for providing an additional opening into the cylinder, for the purpose of relieving y y 'soxifression,` testing the regularity of the firing, introducing substances for cleaning the cylinder walls, taking off a portion of the exploded gases to operate a pump or to be storedup for future use in starting, or for introducing into the compression space any gas, liquid or other substance to start or assist in starting the engine.

To. this end my invention provides a special form of bolt-which -is to be used in place of one of the regular bolts by which the head of the cylinder is fastened inv plac'e. These bolts usually pass through a sleeve which is cast as a part of the head and eX- tends across the water space, the threaded portion of the bolt engaging with a tapped hlein the Wall of the cylinder. The special bolt which I provide has a passage extending longitudinally fora portion ofv its length and emerging at one side of the bolt ata depth sufficient to permitit tocommunicate with a duct. drilled in the cylinder' head below the water jacket and intersecting the.

bolt hol-e. The outer end or head of the bolt is preferably countersunk and screw threaded to enablea pipe or other appliance'to be connected to it. 'l

In the accompanying drawing, Figure lnes, of which the follow-I Iis a section ofa portion 'of the upper end an enginecylinder and its water-jacketed' head, showlng one of my improved bolts f applied thereto. Fig. 2 is a perspective view of the bolt. Fig. 3 shows a priming cup screwed into the 'outer end ofthe bolt, and

Fig. 4 shows a pipe` coupled thereto.

The wan of the cylinder 1 is thick enugh to provide for a Water jacket 2, and `at its, upper end it has a solid portion 3 in which are drilled the tapped holes 4 for the reception of the bolts which fasten the cylinder head' 5 in` place. This head has a water space 6 which is crossedgby the sleeves 7" through which the fastening bolts pass to engage with the holes 4. `When the piston 8 is at the upper endy of its stroke a combustion chamber 9 is formed at the top ofV the' cylinder above such piston.

In applying my invention to such a structure, I drill a hole or duct 10 from vvthe Com- .l`

bustion chamber to .intersect the 'lilt hole.

This duct is preferably diflled in the head 5, as shown. The ordinary fastening bolt is removed and my special bolt is substituted therefor., V'This bolt has the usual threaded shank 11 to engage with the tapped hole 4, and a head 12 toclamp the cylinder head. Packing 13 may be placed under the Vbolt head if s desired. A passage 14 is drilled longitudinally from the bolt head down into the bolt to or a little beyond the level of the duct 10, and a lateral hole 15 is drilled into the bolt at this point `to intersect the passage 14. The location of the hole 15 is such that it will register with the duct 10 when the bolt is screwed home. In order to avoid the necessity for the rather nice fitting which would be necessary if the hole 15 is torbe made .to re ister exactly with the duct, the bolt is prefrably provided with a circumferential groove 16 into which the hole 15 will enter, said groove being of such dimensions as to insure its registering with the duct 10 irrespective of the angular position of the hole 15. In the drawing the hole vand the ductare shown as exactly in line, but it .will be readily/understood that and may be kept closed by a screw plug 17 110 'y cylinderhead tudnal-passage emerglngat one'sid'e of Sad boltv and 'connecting' wlthsvg1dduct, and

means connected to said bolt for conveying entrance to said chamber afforded without 15 *fluid substancesinto said combustion chamdrilling said water jacket.

ber. In testimony whereof I haue signed my 9. In an internal combustion engine, the name to this specification in the presence of combination with a cylinder and a separate two subscribing witnesses.

head therefor having a water jacket, of a DOUGLAS V. ASHLEY. fastening bolt for said head provided with Witnesses: a longitudinal passage in communication HENRY C. OLMSTED,

with the combustion chamber, whereby an BERTHA M. HUN'1".

copies of this patent may be obtained tor ve cents each, by. addressing the Commissioner of Patents,

Washington, D. C. 

